The aim of 'zero hunger' is to achieve food security, promote sustainable agriculture and to end hunger.
'Zero hunger' is one of the 17 sustainable development goals created by the UN. Other goals include ending poverty, reducing inequalities and ensuring everyone has the right to a quality education.
Hunger is a growing problem as there are already 821 million people who go to bed hungry (one ninth of the population) and the population is expected to grow by 2 billion in the next 30 years.
In contrast 670 million adults and 120 million girls and boys (aged five to 19) are obese. The healthcare costs of obesity are significant and according to the UN harmful diets are linked to one-fifth of all deaths worldwide.
Achieving 'zero hunger' is not only about beating hunger, but also about ensuring everyone has access to a healthy, sustainable and affordable diet.
The UN is encouraging collective action of people, governments and organisations across 150 countries to make changes to help them achieve their goal of 'zero hunger'.
One of the major problems is food waste. According to Waste & Resources Action Programme (WRAP), in the UK around 3.6 million tonnes of food waste and surplus occur in primary production every year.
For more information, visit: http://www.fao.org/world-food-day/take-action/en/